63773531 has 2 divisors, whose sum is σ = 63773532. Its totient is φ = 63773530.

The previous prime is 63773497. The next prime is 63773597. The reversal of 63773531 is 13537736.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63773531 - 2⁶ = 63773467 is a prime.

It is a super-2 number, since 2×63773531² = 8134126512415922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 63773491 and 63773500.

It is not a weakly prime, because it can be changed into another prime (63773131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31886765 + 31886766.

It is an arithmetic number, because the mean of its divisors is an integer number (31886766).

Almost surely, 2^63773531 is an apocalyptic number.

63773531 is a deficient number, since it is larger than the sum of its proper divisors (1).

63773531 is an equidigital number, since it uses as much as digits as its factorization.

63773531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39690, while the sum is 35.

The square root of 63773531 is about 7985.8331437615. The cubic root of 63773531 is about 399.5276319740.

The spelling of 63773531 in words is "sixty-three million, seven hundred seventy-three thousand, five hundred thirty-one".